Review: Mavis Staples and Ben Harper combine for great music

Mavis Staples, "We Get By" (Anti-Records)

Time has certainly not dampened the urgency in Mavis Staples' voice. Now 80, the Grammy-winning legend and social activist has one clear enemy on her new album: the status quo. She sings the word "change" some 20 times.

The terrific "We Get By" opens ...